Granted Patent
Utility
US 5,603,608 · App. 08/424,993
Methods and apparatus for monitoring progressive cavity pumps
Inventor:
Horst F. Marz
Patented Case
View Patent ↗
Granted: Feb 18, 1997
Filed: Apr 19, 1995
Inventor
Horst F. Marz
Assignee (at issue)
ICI Canada, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.